============ initial translation from Move ================

[variant baseline]
public intrinsic fun vector::contains<#0>($t0|v: &vector<#0>, $t1|e: &#0): bool;


[variant baseline]
public intrinsic fun vector::index_of<#0>($t0|v: &vector<#0>, $t1|e: &#0): (bool, u64);


[variant baseline]
public intrinsic fun vector::append<#0>($t0|lhs: &mut vector<#0>, $t1|other: vector<#0>);


[variant baseline]
public native fun vector::borrow<#0>($t0|v: &vector<#0>, $t1|i: u64): &#0;


[variant baseline]
public native fun vector::borrow_mut<#0>($t0|v: &mut vector<#0>, $t1|i: u64): &mut #0;


[variant baseline]
public native fun vector::destroy_empty<#0>($t0|v: vector<#0>);


[variant baseline]
public native fun vector::empty<#0>(): vector<#0>;


[variant baseline]
public intrinsic fun vector::is_empty<#0>($t0|v: &vector<#0>): bool;


[variant baseline]
public native fun vector::length<#0>($t0|v: &vector<#0>): u64;


[variant baseline]
public native fun vector::pop_back<#0>($t0|v: &mut vector<#0>): #0;


[variant baseline]
public native fun vector::push_back<#0>($t0|v: &mut vector<#0>, $t1|e: #0);


[variant baseline]
public intrinsic fun vector::remove<#0>($t0|v: &mut vector<#0>, $t1|i: u64): #0;


[variant baseline]
public intrinsic fun vector::reverse<#0>($t0|v: &mut vector<#0>);


[variant baseline]
public fun vector::singleton<#0>($t0|e: #0): vector<#0> {
     var $t1|v: vector<#0>
     var $t2: vector<#0>
     var $t3: &mut vector<#0>
     var $t4: #0
     var $t5: vector<#0>
  0: $t2 := vector::empty<#0>()
  1: $t1 := $t2
  2: $t3 := borrow_local($t1)
  3: $t4 := move($t0)
  4: vector::push_back<#0>($t3, $t4)
  5: $t5 := move($t1)
  6: return $t5
}


[variant baseline]
public native fun vector::swap<#0>($t0|v: &mut vector<#0>, $t1|i: u64, $t2|j: u64);


[variant baseline]
public intrinsic fun vector::swap_remove<#0>($t0|v: &mut vector<#0>, $t1|i: u64): #0;


[variant baseline]
fun ReturnRefsIntoVec::return_vec_index_immut($t0|v: &vector<u64>): &u64 {
     var $t1: &vector<u64>
     var $t2: u64
     var $t3: &u64
  0: $t1 := move($t0)
  1: $t2 := 0
  2: $t3 := vector::borrow<u64>($t1, $t2)
  3: return $t3
}


[variant baseline]
fun ReturnRefsIntoVec::return_vec_index_mut($t0|v: &mut vector<u64>): &mut u64 {
     var $t1: &mut vector<u64>
     var $t2: u64
     var $t3: &mut u64
  0: $t1 := move($t0)
  1: $t2 := 0
  2: $t3 := vector::borrow_mut<u64>($t1, $t2)
  3: return $t3
}

============ after pipeline `escape_analysis` ================

[variant baseline]
public intrinsic fun vector::contains<#0>($t0|v: &vector<#0>, $t1|e: &#0): bool;


[variant baseline]
public intrinsic fun vector::index_of<#0>($t0|v: &vector<#0>, $t1|e: &#0): (bool, u64);


[variant baseline]
public intrinsic fun vector::append<#0>($t0|lhs: &mut vector<#0>, $t1|other: vector<#0>);


[variant baseline]
public native fun vector::borrow<#0>($t0|v: &vector<#0>, $t1|i: u64): &#0;


[variant baseline]
public native fun vector::borrow_mut<#0>($t0|v: &mut vector<#0>, $t1|i: u64): &mut #0;


[variant baseline]
public native fun vector::destroy_empty<#0>($t0|v: vector<#0>);


[variant baseline]
public native fun vector::empty<#0>(): vector<#0>;


[variant baseline]
public intrinsic fun vector::is_empty<#0>($t0|v: &vector<#0>): bool;


[variant baseline]
public native fun vector::length<#0>($t0|v: &vector<#0>): u64;


[variant baseline]
public native fun vector::pop_back<#0>($t0|v: &mut vector<#0>): #0;


[variant baseline]
public native fun vector::push_back<#0>($t0|v: &mut vector<#0>, $t1|e: #0);


[variant baseline]
public intrinsic fun vector::remove<#0>($t0|v: &mut vector<#0>, $t1|i: u64): #0;


[variant baseline]
public intrinsic fun vector::reverse<#0>($t0|v: &mut vector<#0>);


[variant baseline]
public fun vector::singleton<#0>($t0|e: #0): vector<#0> {
     var $t1|v: vector<#0>
     var $t2: vector<#0>
     var $t3: &mut vector<#0>
     var $t4: #0
     var $t5: vector<#0>
  0: $t2 := vector::empty<#0>()
  1: $t1 := $t2
  2: $t3 := borrow_local($t1)
  3: $t4 := move($t0)
  4: vector::push_back<#0>($t3, $t4)
  5: $t5 := move($t1)
  6: return $t5
}


[variant baseline]
public native fun vector::swap<#0>($t0|v: &mut vector<#0>, $t1|i: u64, $t2|j: u64);


[variant baseline]
public intrinsic fun vector::swap_remove<#0>($t0|v: &mut vector<#0>, $t1|i: u64): #0;


[variant baseline]
fun ReturnRefsIntoVec::return_vec_index_immut($t0|v: &vector<u64>): &u64 {
     var $t1: &vector<u64>
     var $t2: u64
     var $t3: &u64
  0: $t1 := move($t0)
  1: $t2 := 0
  2: $t3 := vector::borrow<u64>($t1, $t2)
  3: return $t3
}


[variant baseline]
fun ReturnRefsIntoVec::return_vec_index_mut($t0|v: &mut vector<u64>): &mut u64 {
     var $t1: &mut vector<u64>
     var $t2: u64
     var $t3: &mut u64
  0: $t1 := move($t0)
  1: $t2 := 0
  2: $t3 := vector::borrow_mut<u64>($t1, $t2)
  3: return $t3
}

============ Diagnostics ================
error: Leaked mutable module-internal reference via return value 0
   ┌─ tests/escape_analysis/return_refs_into_vec.move:12:5
   │
12 │ ╭     fun return_vec_index_mut(v: &mut vector<u64>): &mut u64 {
13 │ │         vector::borrow_mut(v, 0)
14 │ │     }
   │ ╰─────^

warning: Leaked immutable module-internal reference via return value 0
  ┌─ tests/escape_analysis/return_refs_into_vec.move:7:5
  │
7 │ ╭     fun return_vec_index_immut(v: &vector<u64>): &u64 {
8 │ │         vector::borrow(v, 0)
9 │ │     }
  │ ╰─────^